public ColorRGB32 LinearInterpolate(ColorRGB32 other, float rn, float gn, float bn, float an)
{
return(new ColorRGB32(
(byte)((this.red * rn) + (other.red * (1.0f - rn))),
(byte)((this.green * gn) + (other.green * (1.0f - gn))),
(byte)((this.blue * bn) + (other.blue * (1.0f - bn))),
(byte)((this.alpha * an) + (other.alpha * (1.0f - an)))));
}
/// <summary>
/// Pre-multiplies the Red, Green, and Blue color components against the Alpha component.
/// </summary>
/// <param name="color">The color value to be premultiplied.</param>
/// <returns>A new <see cref="ColorRGB32"/> instance that contains the premultiplied color value.</returns>
public static ColorRGB32 PremultiplyAlpha(ColorRGB32 color)
{
var a = color.alpha / 255f;
return(new ColorRGB32(
(byte)(color.Red * a),
(byte)(color.Green * a),
(byte)(color.Blue * a),
255));
}
private unsafe void RefreshCachedBitmap(IBitmap frameBitmap)
{
this.bitmap.Lock();
if (frameBitmap is BitmapRGB24)
{
var bmp24 = frameBitmap as BitmapRGB24;
fixed (void* ptr = &bmp24.Pixels[0])
{
IntPtr buffer = new IntPtr(ptr);
this.bitmap.WritePixels(new Int32Rect(0, 0, bmp24.Width, bmp24.Height), buffer, bmp24.Pixels.Length * 3, bmp24.Width * 3);
}
}
else if (frameBitmap is BitmapRGB32)
{
var bmp32 = frameBitmap as BitmapRGB32;
fixed (void* ptr = &bmp32.Pixels[0])
{
IntPtr buffer = new IntPtr(ptr);
this.bitmap.WritePixels(new Int32Rect(0, 0, bmp32.Width, bmp32.Height), buffer, bmp32.Pixels.Length * sizeof(ColorRGB32), bmp32.Width * 4);
}
}
else
{
var bmp = frameBitmap as BitmapRGB;
var src = bmp.Pixels;
var pix = new ColorRGB32[bmp.Size.Elements];
for (int i = 0; i < pix.Length; i++)
{
var p = src[i];
pix[i] = new ColorRGB32(p.Red, p.Green, p.Blue, p.Alpha);
}
fixed (void* ptr = &pix[0])
{
IntPtr buffer = new IntPtr(ptr);
this.bitmap.WritePixels(new Int32Rect(0, 0, bmp.Width, bmp.Height), buffer, bmp.Pixels.Length * sizeof(ColorRGB32), bmp.Width * sizeof(ColorRGB32));
}
}
this.bitmap.AddDirtyRect(new Int32Rect(0, 0, this.bitmap.PixelWidth, this.bitmap.PixelHeight));
this.bitmap.Unlock();
this.Dispatcher.Invoke(DispatcherPriority.Render, EmptyAction);
}
public ColorRGB32 LinearInterpolate(ColorRGB32 other, float n)
{
return(this.LinearInterpolate(other, n, n, n, n));
}
/// <summary>
/// Pre-multiplies the Red, Green, and Blue color components against the Alpha component.
/// </summary>
/// <returns>A new <see cref="ColorRGB32"/> instance that contains the premultiplied color value.</returns>
public ColorRGB32 PremultiplyAlpha()
{
return(ColorRGB32.PremultiplyAlpha(this));
}
/// <summary>
/// Indicates whether this <see cref="ColorRGB32"/> and a specified <see cref="ColorRGB32"/> instance represent the same color value.
/// </summary>
/// <param name="other">A <see cref="ColorRGB32"/> instance to compare to the current instance.</param>
/// <returns>true if both instances represent the same color value; otherwise false.</returns>
public bool Equals(ColorRGB32 other)
{
return(this == other);
}
public ColorRGB32 LinearInterpolate(ColorRGB32 other, float rn, float gn, float bn, float an)
{
return new ColorRGB32(
(byte)((this.red * rn) + (other.red * (1.0f - rn))),
(byte)((this.green * gn) + (other.green * (1.0f - gn))),
(byte)((this.blue * bn) + (other.blue * (1.0f - bn))),
(byte)((this.alpha * an) + (other.alpha * (1.0f - an))));
}
public ColorRGB32 LinearInterpolate(ColorRGB32 other, float n)
{
return this.LinearInterpolate(other, n, n, n, n);
}
/// <summary>
/// Indicates whether this <see cref="ColorRGB32"/> and a specified <see cref="ColorRGB32"/> instance represent the same color value.
/// </summary>
/// <param name="other">A <see cref="ColorRGB32"/> instance to compare to the current instance.</param>
/// <returns>true if both instances represent the same color value; otherwise false.</returns>
public bool Equals(ColorRGB32 other)
{
return this == other;
}
/// <summary>
/// Pre-multiplies the Red, Green, and Blue color components against the Alpha component.
/// </summary>
/// <param name="color">The color value to be premultiplied.</param>
/// <returns>A new <see cref="ColorRGB32"/> instance that contains the premultiplied color value.</returns>
public static ColorRGB32 PremultiplyAlpha(ColorRGB32 color)
{
var a = color.alpha / 255f;
return new ColorRGB32(
(byte)(color.Red * a),
(byte)(color.Green * a),
(byte)(color.Blue * a),
255);
}
